Loud grinding noise on dvr110

hello forum…I have just installed a dvr110 and burned a few discs without any problems…however when I try to read them on the same drive it spins up as usual and then there is this VERY loud grinding noise as if the disc has shattered…it does this a couple of times then reads normally for the rest of the disc. I have noticed a faint scratch line on the TOP surface of the discs about a centimetre from the outer edge…any ideas? is it worth trying other discs or shal I RMA it?..any advice is welcome…thanks…dave

of course you should always try other things and try to exhaust all posibilities before you RMA. If it keeps doing it then for sure send it back. Good luck.